New i915_pm_lpsp igt solution approach relies on connector specific debugfs attribute i915_lpsp_capability, it exposes whether an output is capable of driving lpsp.
v2: - CI fixup. v3: - register i915_lpsp_info only for supported connector. [Jani] - use intel_display_power_well_is_enabled() instead of looking inside power_well count. [Jani] - fixes the lpsp capable conditional logic. [Jani] - combined the lpsp capable and enable info. [Jani] v4: - Separate out connector based debugfs i915_lpsp_capability lpsp enable status would be exposes by different entry. [Animesh] v5: - Add Platform Gen condition to add i915_lpsp_capability and some cosmetic nitpick changes. [Animesh] Reviewed-by: Animesh Manna <[email protected]> Signed-off-by: Anshuman Gupta <[email protected]> --- .../drm/i915/display/intel_display_debugfs.c | 53 +++++++++++++++++++ 1 file changed, 53 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index bdeea2e02642..ea48de3cac24 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -1991,6 +1991,48 @@ static int i915_hdcp_sink_capability_show(struct seq_file *m, void *data) } DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability); +#define LPSP_CAPABLE(COND) (COND ? seq_puts(m, "LPSP: capable\n") : \ + seq_puts(m, "LPSP: incapable\n")) + +static int i915_lpsp_capability_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + struct intel_encoder *encoder = + intel_attached_encoder(to_intel_connector(connector)); + struct drm_i915_private *i915 = to_i915(connector->dev); + + if (connector->status != connector_status_connected) + return -ENODEV; + + switch (INTEL_GEN(i915)) { + case 12: + /* + * Actually TGL can drive LPSP on port till DDI_C + * but there is no physical connected DDI_C on TGL sku's, + * even driver is not initilizing DDI_C port for gen12. + */ + LPSP_CAPABLE(encoder->port <= PORT_B); + break; + case 11: + LPSP_CAPABLE(connector->connector_type == DRM_MODE_CONNECTOR_DSI || + connector->connector_type == DRM_MODE_CONNECTOR_eDP); + break; + case 10: + case 9: + LPSP_CAPABLE(encoder->port == PORT_A && + (connector->connector_type == DRM_MODE_CONNECTOR_DSI || + connector->connector_type == DRM_MODE_CONNECTOR_eDP || + connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort)); + break; + default: + if (IS_HASWELL(i915) || IS_BROADWELL(i915)) + LPSP_CAPABLE(connector->connector_type == DRM_MODE_CONNECTOR_eDP); + } + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(i915_lpsp_capability); + static int i915_dsc_fec_support_show(struct seq_file *m, void *data) { struct drm_connector *connector = m->private; @@ -2134,5 +2176,16 @@ int intel_connector_debugfs_add(struct drm_connector *connector) debugfs_create_file("i915_dsc_fec_support", S_IRUGO, root, connector, &i915_dsc_fec_support_fops); + /* Legacy panels doesn't lpsp on any platform */ + if ((INTEL_GEN(dev_priv) >= 9 || IS_HASWELL(dev_priv) || + IS_BROADWELL(dev_priv)) && + (connector->connector_type == DRM_MODE_CONNECTOR_DSI || + connector->connector_type == DRM_MODE_CONNECTOR_eDP || + connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort || + connector->connector_type == DRM_MODE_CONNECTOR_HDMIA || + connector->connector_type == DRM_MODE_CONNECTOR_HDMIB)) + debugfs_create_file("i915_lpsp_capability", 0444, root, + connector, &i915_lpsp_capability_fops); + return 0; } -- 2.26.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
